Portable brick-kiln furnace



SAMUEL P. CRAFTS, OF HAMDEJ, CONNECTICUT.

PORTABLE BRICK-KILN FURNAC'.

ef. s.

CATIOW-'orming part of Letters Patent Nol 337,927, dated Marcil 16,1836.

Application tiled December 18, 1883. Serial No. lso'. (No model.)

.To all whom it may concern:

Beit known that I, SAMUEL P. Gnarls, a citizen ot' the United States,residing iu the town of Hamden and State of Connecticut, have invented anew and useful Improved Portable Brick-Kiln Furnace, of which thefollowing is a specification.

My invention relates to a portable brickkiln furnace, and has for itsobject to provide a furnacefor burning coal, which maybe easily shiftedfrom one kiln to another.

The invention consistsin the novel construction and arrangement of theparts of the furnace, as hereinafter more fully describedandparticularly pointed out in the claims.

In the accompanying drawings, Figure l represents my improved furnaceandthe meth od of its practical application to a brick-kiln. Fig. 2 is aview ot' one ot' the double transverse bars of the furnace base orframe, and Fig. 3 represents the inode ot' arranging and securin e,` thegrate-bars.

Referring to the drawings, A designates a brick-kiln built up in theusual and well-known manner and having the common transverse horizontalfire-arches B at the bottom. The sides of the kiln are faced with theordinary non-conducting walls or casing, C, consisting of burned brickplastered over with clay. An aperture, l, for the passage of heat, isleft in the casing at the mouth of each arch and lined with tire-brickto withstand the action of the heat. Above this aperture is a smallerone, e, which communicates with the peak or highest part of the arch.

In front of each 'tire-arch, and entirely exterior to the kiln, is aportable furnace consisting of a series of U-shaped arches, 7L, made ofrire-clay and arranged upon an iron base 0r frame, which also supportsthe re-grates The supporting-frame is composed of a pair projections ron their meeting ends, which set into the space between the two parts ofthe middle double bar. The opposite ends ofthe grate-bars simply rest onthe transverse bars, and are therefore free to expand and contract. Afurnace-front or door-plate, p, is arranged against and covers thefront. end of the arches B. It is bolted at the bottom corners to theends et' the bars a, and its upper part is braced by diagonal stays s,secured near the middle oil" the bars. The rear ends ot the furnacesabut against the face ofthe kiln around the apertures or throats Z,through which the heat passes freely into the arches. An airtube, t, isplaced over each furnace, with one end resting on the furnace front andits opposite end inserted into the aperture c. The joint around the tubewhere it enters the wall is calked with clay and made air-tight. A loosebrick wall, u, is laid up between the furnace-fronts, and the arches andtubes are buried under a bank of sand, earth, or loam, w, to prevent theradiation ot' heat. The sand contiguous tothe furnace and around thetube t becomes heated, and the tubes deliver a current of hot air intothe peak of the arch for the purpose ot' facilitating` and perfectingthe combustion of the heated gases, and also giving a deeper red colorto the bricks. The tube also serves as a peep-hole through which theinterior of the flue may be viewed.

Any kind of sand may be used for banking up the furnaces; but the finestriking-sand used in brick-making is the best for this purpose, and mayin this manner be dried for use without eXtra expense. These furnacesare placed on both sides ot' the kiln, one at each end of the arches B.The heat passes from the furnaces through the apertures into the arches,and thence between the bricks, and the tubes t supply a sufficientquantity of heated air to oxidize the bricks, and thereby give them adeeper red color. It is evident that the arches may be formedrectangular or otherwise than U-shaped, and made in single pieces, or inhalf-sections joined at the top. If desired, the supporting base orframe may be formed iu one piece, having the transverse bars integralwith the longitudinal bars.

The advantages of this furnace are that it is inexpensive, easily movedfrom one kiln to another, and admits the use of coal in place of IOOwood, thereby lessening the. expense and producing superior bricks.

I claim as new and desire to secure by Letters Patentl. A portablefurnace for brick-kilns, cousisting of a grate frame or base erectedeXterior to the kiln, a furnacefront or door-plate secured to the base,an arch of lire-clay mounted upon the grate frame or base and coveredwith sand or other noueonducting material banked against the face of thekiln, and an air-tube arranged over the furnace Within the covering,with one end inserted into the easing of the kiln and communicating withthe peak ofthe fire-arch for admitting heated air to the interior of thekiln, substantially as and for the purpose described.

project-ions r at their meeting ends which are adapted to t between thesides of a double transverse bar, m, substantially as described.

SAMUEL P. CRAFTS.

NVituesses:

DAVID K. ANDREWS, EARLLIss P. ARvrNE.

